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Western Electricity Coordinating Council (WECC)
WECC is responsible for coordinating and promoting BES reliability in the Western Interconnection. WECC’s 329 members, which include 39 BAs, represent a wide spectrum of organizations with an interest in the BES. Serving an area of nearly 1.8 million square miles and approximately 81 million people, it is geographically the largest and most diverse of the NERC Regional Reliability Organizations. WECC’s service territory includes the Canadian provinces of Alberta and British Columbia, the northern portion of Baja California in Mexico, and all or portions of the 14 western states in between.
Recent Boundary Changes
In 2013, there was a small change in the footprint of two of the WECC subregions. Valley Electric Association, Inc. moved from Nevada Power within the DSW to the California ISO in the CALS subregion.
  • Link to Website
  • Link to WECC 2013 LTRA Part II Documentation (Methods and Assumptions)
Long Term Reliability Assessment Methods and Assumptions
  • 2013 LTRA Part II
  • 2012 LTRA Part II
  • 2011 LTRA Part II
Summer Reliability Assessment Methods and Assumptions
  • 2013 SRA Part II
  • 2012 SRA Part II
  • 2011 SRA Part II
Winter Reliability Assessment Methods and Assumptions
  • 2013 WRA Part II
  • 2012 WRA Part II
  • 2011 WRA Part II

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